| 1 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 2 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 3 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 4 | Partners In Crude, Inc. | Ponca City, OK 74602 | Oil & Gas Operator | Dec 1997 |
| 5 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 6 | Pauley Oil | | Oil Operator | Jun 2025 |
| 7 | Peak Operating LLC | Oklahoma City, OK 73157 | Oil & Gas Operator | Jun 2025 |
| 8 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 9 | Petroleum Develo | | Oil Operator | Sep 1986 |
| 10 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 11 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 12 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 13 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 14 | Petroleum Techno | | Oil & Gas Operator | Dec 1996 |
| 15 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 16 | Petropro Petroleum LLC | | Oil Operator | Jun 2025 |
| 17 | Petx Petroleum C | | Oil Operator | Nov 1993 |
| 18 | Phillips Oil Company, LLC | Wichita, KS 67211 | Oil Operator | Jun 2025 |
| 19 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 20 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 21 | Phillips William | | Oil Operator | Jul 1989 |
| 22 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jun 2025 |
| 23 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 24 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 25 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Jun 2025 |
| 26 | Pioneer Operatio | | Oil & Gas Operator | Mar 1986 |
| 27 | Pitman Creek, Inc. | Burlington, IA 52601 | Oil Operator | Dec 1992 |
| 28 | Plano Petroleum Corporation | McKinney, TX 75070 | Oil & Gas Operator | Jun 2025 |
| 29 | Plum Creek Energy, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Jun 2025 |
| 30 | Poor Boy Corporation | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 31 | Popp Operating, Inc. | Hoisington, KS 67544 | Oil Operator | Jun 2025 |
| 32 | Powers, Dixon D. | Great Bend, KS 67530 | Oil & Gas Operator | Oct 1995 |
| 33 | Prater Oil & Gas Operations, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 34 | Premier Oil & Exploration Inc | Hutchinson, KS 67502 | Oil & Gas Operator | Jun 2025 |
| 35 | Production Drilling, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 36 | Prolific Resources LLC | Wichita, KS 67208 | Oil & Gas Operator | Jun 2025 |
| 37 | Prospect Oil & G | | Oil Operator | Feb 1996 |
| 38 | Prospect Oil & Gas Corp | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 39 | Provine, B.R. | Wichita, KS 67226 | Oil Operator | Apr 2010 |
| 40 | Pyramid Corporat | | Oil & Gas Operator | Aug 1995 |